Got multithreaded rasterizer working. This is nice with TBR where you can dedicate a thread per tile. Though I got post-transform vertex caching disabled, so still need to make that thread-safe.
Should also sort tiles by number of binned clusters to reduce thread idle time at the end of the frame.
It's nice to have graphics unit test to validate all these changes and have more confidence that I didn't break anything 😀 Should add some more tests though